US Bridges

SR 9 over Silver Run

Fair

New Castle County, Delaware · N.E. of Odessa · Structure no. 1390 424

Built
1989
36 years old
Condition
Fair
inspected March 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
332 ft
8 main spans
Daily traffic
840
2022 count
Owner
State
State Highway Agency

About this bridge

SR 9 over Silver Run is a prestressed concrete box beam or girders - single or spread carrying SR 9 over Silver Run in New Castle County, Delaware. It was built in 1989, so it is 36 years old, younger than the Delaware average of 47.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 840 vehicles a day, roughly 7% of them trucks, projected to reach 1,046 by 2042. The structure is 332 ft (101.2 m) long and 37 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesSR 9
CrossesSilver Run
LocationN.E. of Odessa
RouteState Highway 9
CountyNew Castle County
StateDelaware
Coordinates39.47639, -75.60291
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.1 US tons
Inventory rating49.3 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20 + Mod
Structure length332 ft (101.2 m)
Longest span41 ft (12.6 m)
Deck width37 ft (11.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic840 (2022)
Projected traffic1,046 by 2042
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 9 over Silver Run built?

It was built in 1989, making it 36 years old in 2025.

What condition is SR 9 over Silver Run in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in March 2023.

How much traffic does SR 9 over Silver Run carry?

About 840 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is SR 9 over Silver Run?

The structure is 332 ft (101.2 m) long with a longest span of 41 ft (12.6 m) and a deck 37 ft wide.

Who owns SR 9 over Silver Run?

It is owned by the State Highway Agency.